compressImage · ImageEditorMCPServer MCP: Risk & Policy

WHAT IT DOES

What compressImage does on ImageEditorMCPServer

AI agents use compressImage to create or update resources in ImageEditorMCPServer — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your ImageEditorMCPServer environment.

WHY IT NEEDS A POLICY

Why compressImage needs a policy

Compression modifies the image file (lossy or lossless quality adjustment), which is a reversible write operation in the sense that the original could be retained, but the output is a modified version of the input. It does not delete data irreversibly in the destructive sense (original typically preserved), nor does it execute arbitrary code. Write is the most appropriate category.

From the tool's definition 「画像の品質を調整してファイルサイズを小さくします」(Adjusts image quality to reduce file size) — compressImage modifies image data by reducing quality/size

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

compressImage Rate-limited

compressImage stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "compressImage": {
      "limits": [
        {
          "counter": "compressimage_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches ImageEditorMCPServer, so you can run agents against it safely.

FAQ

Questions about compressImage

What does the compressImage tool do? +

画像の品質を調整してファイルサイズを小さくします。. It is categorised as a Write tool in the ImageEditorMCPServer MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on compressImage? +

Register the ImageEditorMCPServer MCP server in PolicyLayer and add a rule for compressImage: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches ImageEditorMCPServer. Nothing to install.

What risk level is compressImage? +

compressImage is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit compressImage? +

Yes. Add a rate_limit block to the compressImage rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block compressImage completely? +

Set action: deny in the PolicyLayer policy for compressImage. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides compressImage? +

compressImage is provided by the ImageEditorMCPServer MCP server (kentakki416/image-editor-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.